Kenji Tanaka
National Institutes of Natural Sciences, Japan
433 Papers
2.9K Citations
Kenji Tanaka is an academic researcher from National Institutes of Natural Sciences, Japan. The author has contributed to research in topics: Large Helical Device & Plasma. The author has an hindex of 43, co-authored 396 publications. Previous affiliations of Kenji Tanaka include Graduate University for Advanced Studies & Kyushu University.
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Papers
Effect of carbon divertor plates on impurities, Zeff and density limit in large helical device
S. Morita,Motoshi Goto,Hisamichi Funaba,Hiroshi Idei,Katsunori Ikeda,Shigeru Inagaki,Osamu Kaneko,Kazuo Kawahata,Akio Komori,Shin Kubo,Ryuhei Kumazawa,Suguru Masuzaki,J. Miyazawa,Tomohiro Morisaki,Osamu Motojima,Sadatsugu Muto,Takashi Mutoh,Y. Nakamura,Kazumichi Narihara,K. Nishimura,N. Noda,Satoshi Ohdachi,Nobuyoshi Ohyabu,Yoshihide Oka,Masaki Osakabe,Akio Sagara,Satoru Sakakibara,Ryuichi Sakamoto,Tetsuo Seki,Takashi Shimozuma,Mamoru Shoji,Hajime Suzuki,Yasuhiko Takeiri,Kenji Tanaka,Kazuo Toi,Tokihiko Tokuzawa,Katsuyoshi Tsumori,Hiroshi Yamada,K.Y. Watanabe,T. Watari +39 more
TL;DR: The behavior of impurities, Zeff (effective charge) and density limit is discussed and results from spectroscopic measurements are presented in this article, where it is shown that metal impurities decreased and high influxes of carbon and oxygen were measured.
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Transition between Isotope-Mixing and Nonmixing States in Hydrogen-Deuterium Mixture Plasmas
Katsumi Ida,Katsumi Ida,Motoki Nakata,Motoki Nakata,Kenji Tanaka,Mikirou Yoshinuma,Mikirou Yoshinuma,Y. Fujiwara,Ryuichi Sakamoto,Ryuichi Sakamoto,Gen Motojima,Suguru Masuzaki,Suguru Masuzaki,T. Kobayashi,T. Kobayashi,Kotaro Yamasaki +15 more
TL;DR: The transition between isotope-mixing and nonmixing states in hydrogen-deuterium mixture plasmas is observed and the transition of turbulence state from TEM to ion temperature gradient is predicted by gyrokinetic simulation.
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Gyrokinetic microinstability analysis of high-T i and high-T e isotope plasmas in Large Helical Device
Motoki Nakata,Motoki Nakata,Kenichi Nagaoka,Kenichi Nagaoka,Kenji Tanaka,Hiromi Takahashi,Hiromi Takahashi,Masanori Nunami,Masanori Nunami,Shinsuke Satake,Shinsuke Satake,Masayuki Yokoyama,Masayuki Yokoyama,Felix Warmer +13 more
TL;DR: In this paper, the authors explored transport and confinement characteristics, and microinstabilities for high and high isotope plasmas in large Helical Device by using the gyrokinetic Vlasov simulation GKV with hydrogen isotope ions and real-mass kinetic electrons.
A study of high-energy ions produced by ICRF heating in LHD
Kenji Saito,Ryuhei Kumazawa,Takashi Mutoh,Tetsuo Seki,T. Watari,T. Yamamoto,Yuki Torii,N. Takeuchi,C." Zhang,Y. Zhao,Atsushi Fukuyama,Fujio Shimpo,Goro Nomura,Mitsuhiro Yokota,A. Kato,Mamiko Sasao,Mitsutaka Isobe,A. V. Krasilnikov,T. Ozaki,Masaki Osakabe,K. Narihara,Y. Nagayama,Shigeru Inagaki,Kimitaka Itoh,T. Ido,S. Morita,Kunizo Ohkubo,Masahide Sato,Shin Kubo,Takashi Shimozuma,Hiroshi Idei,Yasuo Yoshimura,Takashi Notake,Osamu Kaneko,Y. Takeiri,Yoshihide Oka,Katsuyoshi Tsumori,Katsunori Ikeda,A. Komori,Hiroshi Yamada,H. Funaba,K.Y. Watanabe,Satoru Sakakibara,Ryuichi Sakamoto,J. Miyazawa,Kenji Tanaka,B.J. Peterson,N. Ashikawa,S. Murakami,T. Minami,Mamoru Shoji,Satoshi Ohdachi,S. Yamamoto,Hajime Suzuki,Kazuo Kawahata,M. Emoto,Hideya Nakanishi,N. Inoue,Nobuyoshi Ohyabu,Y. Nakamura,Suguru Masuzaki,Sadatsugu Muto,Kuninori Sato,Tomohiro Morisaki,Masayuki Yokoyama,Tomo-Hiko Watanabe,Motoshi Goto,Ichihiro Yamada,Katsumi Ida,T. Tokuzawa,N. Noda,K. Toi,Soichiro Yamaguchi,K. Akaishi,Akio Sagara,K. Nishimura,K. Yamazaki,S. Sudo,Y. Hamada,O. Motojima,Masami Fujiwara +80 more
TL;DR: In this article, the behavior of high-energy ions created by ion cyclotron range of frequency (ICRF) heating on the Large Helical Device (LHD) was investigated in the minority heating regime using turnoff or modulation of ICRF power.
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Comparison of electron internal transport barriers in the large helical device and JT-60U plasmas
Katsumi Ida,Takaaki Fujita,T. Fukuda,Yoshiteru Sakamoto,Shunsuke Ide,Kazuo Toi,Shigeru Inagaki,Takashi Shimozuma,Shin Kubo,Hiroshi Idei,Akihide Fujisawa,Satoshi Ohdachi,Mikirou Yoshinuma,Hisamichi Funaba,Kazumichi Narihara,Sadayoshi Murakami,A. Wakasa,Masayuki Yokoyama,Yasuhiko Takeiri,K.Y. Watanabe,Kenji Tanaka,Yunfeng Liang,Nobuyoshi Ohyabu +22 more
TL;DR: In this article, the maximum values of R/L Te, where R is the major radius and L Te is the scale length of the electron temperature gradient, are similar for the LHD and JT-60U ITB plasmas.
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